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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair
Make
Model
Problem
Solution
Date
Found: 1049
Panasonic
Alpha 1 TX3
Line whisle with cogging verts
STR54041M - also check elects
14-09-04
Panasonic
Alpha 1 TXC71
Sound noisy - ok thro scart
C2401 dry joint on AV/tuning/control board
14-09-04
Panasonic
Alpha 1 TXC74
Width lacking
Q753 2SD762 o/c
14-09-04
Panasonic
Alpha 1W
Chan ind lit with whistle & nothing else
No line drive traced to IC101 TDA4505-M1 jungle chip
14-09-04
Panasonic
Alpha 1W
Cogging on verts
C808 10µ50v
14-09-04
Panasonic
Alpha 1W
Dead
No 12v supply to line osc pin 7 IC101 from 12v reg IC851 - D855 o/c
14-09-04
Panasonic
Alpha 1W
Field collapse
TDA4505M faulty - use TDA4505E & change R112 from 1M5 to 470k & R113 from 22k to 470k
14-09-04
Panasonic
Alpha 1W
Loud wine but no picture.
R851 ( 1.2R fusible ) go's high.
14-09-04
Panasonic
Alpha 1W
NO COLOUR
TDA3562A
14-09-04
Panasonic
Alpha 1W
No sound or picture - squealing from PSU.
D854 s/c , if still no good suspect LOPTX.
14-09-04
Panasonic
Alpha 2
AFTER 1hr TEXT FLASHES ON SCREEN . TEXT LOSES SYNC
C3511 10nF
14-09-04
Panasonic
Alpha 2
AFTER 4hrs R567 BLOWS AND Q551 VERY HOT
C502 DRY JOINTED
14-09-04
Panasonic
Alpha 2
Analogue bars not locked - pic ok
C3511 220pf connected to pin 24 pulse gen chip on Txt panel leaky
14-09-04
Panasonic
Alpha 2
Black line on RH side of pic
Check dry joints line dr trfmr before LOPTr bites dust!
14-09-04
Panasonic
Alpha 2
Blank raster - no tuning
C2612 10µ non pol cap dry joints at pin 5 IC2601 TV/AV sw IC
14-09-04
Panasonic
Alpha 2
Blank raster, no sound & unlocked chan no
No 12v on A panel due to R2420 0R68 o/c
14-09-04
Panasonic
Alpha 2
BLOWS LINE TRANSISTOR
LINE DRIVER TX DRY JOINTED
14-09-04
Panasonic
Alpha 2
BLUE DISAPPEARS AFTER HALF AN HOUR
C612 0.01uF ON PIN 5 IC601
14-09-04
Panasonic
Alpha 2
Chan display only
D851 leaky in secondary of psu
14-09-04
Panasonic
Alpha 2
Chroma but no luma
replace TDA4565 CTI chip
14-09-04
Panasonic
Alpha 2
Col smearing (red in this case)
L353 on crt base cracked
14-09-04
Panasonic
Alpha 2
COLOUR FAULTY WITH REF OSC TYPE RED/GREEN BARS RUN
C642 10nf ( TO SET OSC. SHORT PIN 11 OF IC601 TO Chassis AND ADJ. TRIMMER )
14-09-04
Panasonic
Alpha 2
Colour int off & changes hue
C612 0µ01 pin 5 IC601 leaky or C642 leaky
14-09-04
Panasonic
Alpha 2
Contrast - poor.
R562 ( 130k , 0.25W ) o/c.
14-09-04
Panasonic
Alpha 2
Contrast weak
R562 130k ?w in beam current lim
14-09-04
Panasonic
Alpha 2
Dead
D854 & R815 ( 5.6ohm ) over volts diode
14-09-04
Panasonic
Alpha 2
Dead - no line drive
R851 2R2 in line dr tr supply o/c
14-09-04
Panasonic
Alpha 2
Dead - was no pic to start with
LOP tr 2SD1441 s/c, fusible R567 1A N25CP o/c, R851 1R2 1/2w o/c, replaced C855 100µ 35v, C808 10µ 50v (both hi esr)
14-09-04
Panasonic
Alpha 2
Dead aft 20 mins
OK if pins 3 & 4 of opto linked - D811 ON3105 opto coupler faulty
14-09-04
Panasonic
Alpha 2
Dead aft 4hrs with LOPTr overheated
R567 o/c in LOP - C502 in line osc stage dry joint
14-09-04
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Last SM download : Ameritron LA-1000
script execution: 0.14 s